JP4570485B2 - Ophthalmic equipment - Google Patents

Ophthalmic equipment Download PDF

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JP4570485B2
JP4570485B2 JP2005061346A JP2005061346A JP4570485B2 JP 4570485 B2 JP4570485 B2 JP 4570485B2 JP 2005061346 A JP2005061346 A JP 2005061346A JP 2005061346 A JP2005061346 A JP 2005061346A JP 4570485 B2 JP4570485 B2 JP 4570485B2
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eye
intraocular pressure
measurement unit
working distance
detecting
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JP2006239249A (en
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直人 本多
義明 三村
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Nidek Co Ltd
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Nidek Co Ltd
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Priority to JP2005061346A priority Critical patent/JP4570485B2/en
Priority to PCT/JP2006/304118 priority patent/WO2006093280A1/en
Priority to KR1020077019584A priority patent/KR101170358B1/en
Priority to EP06715201A priority patent/EP1854400B1/en
Priority to US11/795,811 priority patent/US7588336B2/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/16—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for measuring intraocular pressure, e.g. tonometers
    • A61B3/165—Non-contacting tonometers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/103—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining refraction, e.g. refractometers, skiascopes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/18—Arrangement of plural eye-testing or -examining apparatus

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Biophysics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Eye Examination Apparatus (AREA)

Description

本発明は、被検眼の異なる眼特性を測定（検査）する眼科装置に関し、さらに詳しくは、眼圧と眼屈折力等の眼の光学特性を測定（検査）する眼科装置に関する。   The present invention relates to an ophthalmic apparatus that measures (inspects) different eye characteristics of an eye to be examined, and more particularly to an ophthalmic apparatus that measures (inspects) optical characteristics of an eye such as intraocular pressure and eye refractive power.

被検眼の眼圧と、他の眼特性（例えば、眼屈折力測定、角膜形状、眼底撮影等）の測定（検査）とを単一の装置として行うことができる複合型眼科装置として、眼圧測定と眼屈折力測定を行うことのできる装置が提案されている（特許文献１参照）。
このような装置においては、眼圧測定に移行する際に被検眼とノズルとの接触を回避するために、被検眼とノズルとの距離を光学的に検出する機構が設けられている。そして、検出の結果、接触の可能性のある距離以下になった場合には、眼圧測定部への切り換えを停止するような制御を行っている。
特開２００４−３１３７５８号公報 Intraocular pressure as a combined ophthalmic device capable of performing intraocular pressure of the subject's eye and measurement (examination) of other eye characteristics (for example, eye refractive power measurement, corneal shape, fundus imaging, etc.) as a single device An apparatus capable of performing measurement and eye refractive power measurement has been proposed (see Patent Document 1).
Such an apparatus is provided with a mechanism for optically detecting the distance between the eye to be examined and the nozzle in order to avoid contact between the eye to be examined and the nozzle when shifting to intraocular pressure measurement. Then, as a result of the detection, when the distance is less than the possibility of contact, control is performed to stop switching to the intraocular pressure measurement unit.
JP 2004-313758 A

しかしながら、上記のような制御において、装置の設置場所によっては外乱光の入射によって誤作動を起こし、実際には被検者がいなくとも被検眼とノズルとの接触の可能性があると判定して眼圧測定部の切り換えを停止してしまう恐れがある。   However, in the control as described above, depending on the installation location of the device, it is determined that there is a possibility of contact between the subject's eye and the nozzle even if there is no subject due to malfunction due to incidence of ambient light. There is a risk that the switching of the intraocular pressure measurement unit will be stopped.

本発明は、上記問題点を鑑み、装置の誤作動を防止しつつ、各検査を効率よく行うことができる複合型眼科装置を提供することを技術課題とする。   In view of the above problems, an object of the present invention is to provide a composite ophthalmologic apparatus that can perform each examination efficiently while preventing malfunction of the apparatus.

上記課題を解決するために、本発明は以下のような構成を備えることを特徴とする。   In order to solve the above problems, the present invention is characterized by having the following configuration.

（１） 眼圧測定モードにおいてノズルを介して被検眼角膜に流体を吹き付ける流体吹付手段を持ち流体の吹き付けにより角膜を変形させて眼圧を測定する眼圧測定部と，眼特性測定モードにおいて被検眼からの反射光を受光して被検眼の光学特性を測定する眼特性測定部とが配置された測定ユニットと、前記測定モードの切換信号を受けて前記眼圧測定部または眼特性測定部のどちらか一方を被検眼の測定に使用可能な状態に切り換える測定部切換手段と、該測定部切換手段により前記眼圧測定部を使用可能状態とする際に前記被検眼に光束を投光し，その反射光を受光することにより前記ノズルの被検眼に対する作動距離を光学的に検出する作動距離検出手段と、該作動距離検出手段の検出結果に基づいて、前記眼圧測定部を使用可能な状態とする切り換え動作を続行するか否かを判定して前記測定部切換手段の駆動制御を行う制御手段と、前記作動距離検出手段による検出結果が前記反射光によるものか否かであるかを直接的または間接的に検知する検知手段と、を有し、該検知手段の検知結果に基づいて、前記作動距離検出手段の検出結果が前記反射光によるものでないとされたときは前記制御手段は前記作動距離検出手段の検出結果によらず眼圧測定部の切り換えを続行するように前記測定部切換手段の駆動制御を行うことを特徴とする。
（２） （１）の眼科装置において、前記検知手段は被検者の存在の有無を検知する手段であり、前記検知手段は被検者の存在の有無により前記作動距離検出手段による検出結果が前記反射光によるものか否かであるかを間接的に検知することを特徴とする。
（３） （２）の眼科装置において、前記検知手段は前記測定ユニットの前方の所定距離内における被検者の存在を検知する超音波センサであることを特徴とする。
（４） （１）の眼科装置において、前記検知手段は前記作動距離検出手段による前記被検眼への光束の投光のオン／オフを行うことにより、前記作動距離検出手段による検出結果が前記反射光によるものか否かであるかを直接的に検知することを特徴とする。
（５） 眼圧測定モードにおいてノズルを介して被検眼角膜に流体を吹き付ける流体吹付手段を持ち流体の吹き付けにより角膜を変形させて眼圧を測定する眼圧測定部と，眼特性測定モードにおいて被検眼からの反射光を受光して被検眼の光学特性を測定する眼特性測定部とが配置された測定ユニットと、前記測定モードの切換信号を受けて前記眼圧測定部または眼特性測定部のどちらか一方を被検眼の測定に使用可能な状態に切り換える測定部切換手段と、該測定部切換手段により前記眼圧測定部を使用可能状態とする際に前記被検眼に光束を投光し，その反射光を受光することにより前記ノズルの被検眼に対する作動距離を光学的に検出する作動距離検出手段と、被検者の存在を検知する検知手段と、該検知手段にて被検者の存在が検知された状態において前記作動距離検出手段の検出結果に基づいて、前記眼圧測定部を使用可能な状態とする切り換え動作を解除するように前記測定部切換手段の駆動制御を行う制御手段と、を備えることをを特徴とする。 (1) An intraocular pressure measurement unit that has fluid spraying means for spraying fluid onto the eye cornea via a nozzle in the intraocular pressure measurement mode and measures the intraocular pressure by deforming the cornea by spraying the fluid; A measurement unit in which an optical characteristic measurement unit that receives reflected light from the optometry and measures optical characteristics of the eye to be examined is disposed; and the intraocular pressure measurement unit or the eye characteristic measurement unit receives the measurement mode switching signal. A measuring unit switching means for switching one of them to a state usable for measurement of the eye to be examined, and a light beam is projected onto the eye to be examined when the intraocular pressure measuring unit is made usable by the measurement unit switching means, A working distance detecting means for optically detecting the working distance of the nozzle with respect to the eye to be examined by receiving the reflected light, and a state in which the intraocular pressure measuring unit can be used based on a detection result of the working distance detecting means. Determining whether or not to continue the switching operation to be in a state and determining whether or not the detection result by the working distance detection means is due to the reflected light Detecting means for directly or indirectly detecting, and when the detection result of the working distance detecting means is not due to the reflected light based on the detection result of the detecting means, the control means Drive control of the measurement unit switching unit is performed so as to continue switching of the intraocular pressure measurement unit regardless of the detection result of the working distance detection unit.
(2) In the ophthalmologic apparatus according to (1), the detection means is a means for detecting the presence or absence of the subject, and the detection means detects the detection result by the working distance detection means depending on the presence or absence of the subject. It is detected indirectly whether it is by the said reflected light.
(3) In the ophthalmologic apparatus according to (2), the detection means is an ultrasonic sensor that detects the presence of the subject within a predetermined distance in front of the measurement unit.
(4) In the ophthalmologic apparatus according to (1), the detection unit turns on / off the projection of the light beam onto the eye to be examined by the working distance detection unit, so that the detection result by the working distance detection unit reflects the reflection. It is characterized by directly detecting whether it is due to light or not.
(5) An intraocular pressure measurement unit that has fluid spraying means for spraying fluid onto the eye cornea through the nozzle in the intraocular pressure measurement mode and measures the intraocular pressure by deforming the cornea by spraying the fluid; A measurement unit in which an optical characteristic measurement unit that receives reflected light from the optometry and measures optical characteristics of the eye to be examined is disposed; and the intraocular pressure measurement unit or the eye characteristic measurement unit receives the measurement mode switching signal. A measuring unit switching means for switching one of them to a state usable for measurement of the eye to be examined, and a light beam is projected onto the eye to be examined when the intraocular pressure measuring unit is made usable by the measurement unit switching means, The working distance detecting means for optically detecting the working distance of the nozzle with respect to the subject's eye by receiving the reflected light, the detecting means for detecting the presence of the subject, and the presence of the subject by the detecting means Is detected Control means for performing drive control of the measurement unit switching means so as to cancel the switching operation for setting the tonometry unit to a usable state based on the detection result of the working distance detection means in the It is characterized by providing.

本発明によれば、装置の誤作動を防止しつつ、各検査を効率よく行うことができる。   According to the present invention, each inspection can be performed efficiently while preventing malfunction of the apparatus.

以下、本実施形態に係る装置について図面に基づいて説明する。図１は本実施形態に係る眼科装置の外観略図であり、本実施形態では眼圧、眼屈折力を測定（検査）する機能を持つ複合型の眼科装置を例として説明する。   Hereinafter, an apparatus according to the present embodiment will be described with reference to the drawings. FIG. 1 is a schematic external view of an ophthalmologic apparatus according to this embodiment. In this embodiment, a composite ophthalmologic apparatus having a function of measuring (inspecting) intraocular pressure and ocular refractive power will be described as an example.

測定ユニット１を上部に備える移動台２は、左右方向（Ｘ方向）及び前後方向（Ｚ方向）に移動可能に基台３上に配置されている。この移動は、ジョイスティック４の操作によりメカニカルに（電動でもよい）行われる。また、測定ユニット１は、駆動部１３０の駆動により、Ｘ方向，Ｚ方向及び上下方向（Ｙ方向）に移動可能に移動台２上に配置されている。また、測定ユニット１のＹ方向への移動については、ジョイスティック４の回転ノブ４ａを操作することによっても電動で行われる。   The movable table 2 provided with the measuring unit 1 on the upper side is arranged on the base 3 so as to be movable in the left-right direction (X direction) and the front-rear direction (Z direction). This movement is performed mechanically (may be electric) by operating the joystick 4. Further, the measurement unit 1 is arranged on the movable table 2 so as to be movable in the X direction, the Z direction, and the vertical direction (Y direction) by driving of the drive unit 130. Further, the movement of the measurement unit 1 in the Y direction is also electrically performed by operating the rotary knob 4a of the joystick 4.

基台３には、被検者の顔を支持するための顔支持ユニット６が固定されている。また、顔支持ユニット６には、被検者の額を軽く押し当てて固定するための額当て部７が設けられている。５はジョイスティック４の頂部に設けられた測定開始スイッチである。８ａは後述する前眼部照明用光源２０からの光を通す投光窓である。   A face support unit 6 for supporting the subject's face is fixed to the base 3. The face support unit 6 is provided with a forehead support 7 for lightly pressing and fixing the subject's forehead. Reference numeral 5 denotes a measurement start switch provided on the top of the joystick 4. Reference numeral 8a denotes a light projection window through which light from an anterior segment illumination light source 20, which will be described later, passes.

２００は、装置から被検者までの距離を測定するための測距センサ（被検者センサ）であり、被検者側に向けて設けられている。本実施形態においては、顔支持ユニット６に設けられている。本実施形態においては、測距センサ２００として超音波センサを用いており、超音波を発信しその反射信号が検出されるまでの時間から距離を測定する（光学式のセンサであってもよい）。なお、このようなセンサとしては、測距センサに限るものではなく、測定時における被検者の存在の有無を検知するものであればよい。この場合、例えば、顔支持ユニット６の顎受け台にタッチセンサを設け、タッチセンサの検知結果から被検者の存在の有無を求めるようにしてもよい。また、測定ユニット１の前方（顔支持ユニット６側）から所定範囲（例えば、４０ｃｍ）以内の被検者の存在の有無を検知するようにしてもよい。   Reference numeral 200 denotes a distance measuring sensor (subject sensor) for measuring the distance from the apparatus to the subject, and is provided toward the subject. In the present embodiment, the face support unit 6 is provided. In the present embodiment, an ultrasonic sensor is used as the distance measuring sensor 200, and the distance is measured from the time until an ultrasonic wave is transmitted and the reflected signal is detected (an optical sensor may be used). . Such a sensor is not limited to the distance measuring sensor, and any sensor that detects the presence or absence of the subject at the time of measurement may be used. In this case, for example, a touch sensor may be provided on the chin rest of the face support unit 6 and the presence or absence of the subject may be obtained from the detection result of the touch sensor. In addition, the presence or absence of the subject within a predetermined range (for example, 40 cm) from the front of the measurement unit 1 (the face support unit 6 side) may be detected.

図２（ａ），（ｂ）は測定ユニット１内を側方から（図１中矢印Ａ方向から）見た概略構成図である。測定ユニット１内には、非接触で被検眼Ｅの眼圧を測定する眼圧測定部１ａが移動機構１００の駆動により作動距離方向（Ｚ方向）に移動可能に配置されている。また、眼特性測定部としての役割をもつ被検眼Ｅの眼屈折力を測定する眼屈折力測定部１ｂが眼圧測定部１ａの上に位置するように固定配置されている。また、眼屈折力測定部１ｂから発せられた測定光を被検眼に導光するための反射ミラー９及び反射ミラー１０、及び反射ミラー９をノズル１３の前方から挿脱させるためのミラー移動ユニット９０が設けられている。   2A and 2B are schematic configuration diagrams of the inside of the measurement unit 1 viewed from the side (from the direction of arrow A in FIG. 1). In the measurement unit 1, an intraocular pressure measurement unit 1 a that measures the intraocular pressure of the eye E without contact is disposed so as to be movable in the working distance direction (Z direction) by driving the movement mechanism 100. In addition, an eye refractive power measurement unit 1b that measures the eye refractive power of the eye E to be examined that has a role as an eye characteristic measurement unit is fixedly disposed so as to be positioned on the intraocular pressure measurement unit 1a. Further, the reflection mirror 9 and the reflection mirror 10 for guiding the measurement light emitted from the eye refractive power measurement unit 1 b to the eye to be examined, and the mirror moving unit 90 for inserting and removing the reflection mirror 9 from the front of the nozzle 13. Is provided.

眼圧測定を行う場合、移動機構１００の駆動により眼圧測定部１ａはＺ方向に平行移動される。また、ミラー移動ユニット９０は、眼圧測定部１ａのＺ方向の移動に連動して、ノズル１３と被検眼Ｅの間にて反射ミラー９を挿脱する。すなわち、眼圧測定部１ａが図２（ａ）の退避位置から図２（ｂ）の測定位置に移動するとき、反射ミラー９は、眼圧測定部１ａが持つノズル１３の前に挿入された状態から離脱された状態に移動される。一方、眼屈折力測定を行う場合には、眼圧測定部１ａが図２（ｂ）の測定位置から図２（ａ）の退避位置の状態に移動され、反射ミラー９は離脱された状態からノズル１３の前に挿入された状態に移動される。このような構成により、前記眼圧測定部１ａまたは眼屈折力（眼特性）測定部１ｂのどちらか一方の測定部を被検眼の測定に使用可能な状態に切り換えられるようになっている。   When performing intraocular pressure measurement, the intraocular pressure measurement unit 1 a is translated in the Z direction by driving the moving mechanism 100. Further, the mirror moving unit 90 inserts and removes the reflecting mirror 9 between the nozzle 13 and the eye E in conjunction with the movement of the tonometry part 1a in the Z direction. That is, when the intraocular pressure measurement unit 1a moves from the retracted position of FIG. 2A to the measurement position of FIG. 2B, the reflection mirror 9 is inserted in front of the nozzle 13 of the intraocular pressure measurement unit 1a. Moved from state to detached state. On the other hand, when performing eye refractive power measurement, the tonometry part 1a is moved from the measurement position of FIG. 2B to the retracted position of FIG. 2A, and the reflection mirror 9 is detached. It is moved to the state inserted in front of the nozzle 13. With such a configuration, one of the intraocular pressure measurement unit 1a and the eye refractive power (eye characteristic) measurement unit 1b can be switched to a state that can be used for measurement of the eye to be examined.

なお、本実施形態においては、眼圧測定部１ａに遮光板３０５が取付けられており、フォトセンサ３０６により遮光板３０５が検出されると、眼圧測定部１ａが図２（ａ）の退避位置に移動したことが後述する制御部１１０により検出される。一方、フォトセンサ３０７により遮光板３０５が検出されると眼圧測定部１ａが図２（ｂ）の測定位置に移動したことが制御部１１０により検出されるようになっている。これにより、眼圧測定部１ａが退避位置及び測定位置に移動したかどうかを検出することができる。   In this embodiment, the light-shielding plate 305 is attached to the intraocular pressure measurement unit 1a, and when the light-shielding plate 305 is detected by the photosensor 306, the intraocular pressure measurement unit 1a moves to the retracted position shown in FIG. It is detected by the control unit 110 which will be described later. On the other hand, when the light shielding plate 305 is detected by the photosensor 307, the control unit 110 detects that the intraocular pressure measurement unit 1a has moved to the measurement position in FIG. Thereby, it can be detected whether the intraocular pressure measurement part 1a moved to the retracted position and the measurement position.

図３は、本実施形態の眼圧測定部１ａや制御系について説明する概略構成図である。１０２は被検眼角膜を変形させるために被検眼に対して空気を噴出する空気（流体）吹付機構であり、シリンダ１１、ピストン１２、ロータリーソレノイド１１３等を有する。１４はノズル１３を保持する透明な２つのガラス板である。１５はノズル１３の背後に設けられた透明なガラス板である。ガラス板１５の背後には、図示無き観察及びＸＹ方向アライメントのための光学系が配置されている。１６はシリンダ１１内の圧力を検出する圧力センサである。２０は前眼部照明用の赤外光源である。   FIG. 3 is a schematic configuration diagram illustrating the intraocular pressure measurement unit 1a and the control system of the present embodiment. Reference numeral 102 denotes an air (fluid) spraying mechanism that blows air toward the subject's eye to deform the subject's eye cornea, and includes a cylinder 11, a piston 12, a rotary solenoid 113, and the like. Reference numeral 14 denotes two transparent glass plates that hold the nozzle 13. A transparent glass plate 15 is provided behind the nozzle 13. Behind the glass plate 15, an optical system for observation and XY-direction alignment (not shown) is arranged. Reference numeral 16 denotes a pressure sensor for detecting the pressure in the cylinder 11. Reference numeral 20 denotes an infrared light source for anterior segment illumination.

４０は角膜Ｅｃの変形状態検出用の赤外光源であり、光源４０による光は、コリメータレンズ４１により略平行光束とされて角膜Ｅｃに投影される。光源４０による角膜反射像は、受光レンズ４２，フィルタ４３，ハーフミラー４４及びピンホール板４５を介して、光検出器４６により受光される。フィルタ４３は、光源４０の光を透過し光源２０の光を透過しない特性を持つ。これら光学系は、角膜Ｅｃが所定の変形状態（偏平状態）のときに光検出器４６の受光量が最大になるように配置されている。   Reference numeral 40 denotes an infrared light source for detecting the deformed state of the cornea Ec. Light from the light source 40 is converted into a substantially parallel light beam by the collimator lens 41 and projected onto the cornea Ec. The cornea reflection image by the light source 40 is received by the photodetector 46 through the light receiving lens 42, the filter 43, the half mirror 44 and the pinhole plate 45. The filter 43 has a characteristic of transmitting light from the light source 40 and not transmitting light from the light source 20. These optical systems are arranged so that the amount of light received by the photodetector 46 is maximized when the cornea Ec is in a predetermined deformed state (flat state).

また、光源４０及びコリメータレンズ４１と、受光レンズ４２、フィルタ４３、受光素子４７は、被検眼Ｅに対する作動距離方向（Ｚ方向）のアライメント状態を検出するための作動距離検出光学系４９を形成する。このとき、光源４０は作動距離検出用の光を発する投光光源の役割を有する。光源４０から光が発せられると、光源４０による角膜反射光は、受光レンズ４２からハーフミラー４４を介して作動距離方向の位置検出素子としての受光素子４７（例えば、ＰＳＤやラインセンサ等）に入射する。被検眼Ｅ（角膜Ｅｃ）がＺ方向に移動すると、光源４０による角膜反射像の入射位置も受光素子４７上を移動するため、受光素子４７からの出力信号に基づき被検眼Ｅに対するＺ方向のアライメント状態を検出することができる。なお、本実施形態において、作動距離検出光学系４９は、被検眼への位置合わせ時だけでなく、眼屈折力測定モードから眼圧測定モードへの切換信号を受けて、眼圧測定部１ａを使用可能な状態にする際に、被検眼（他の障害物も含む）へのノズル１３の接触を回避すべくノズル１３の被検眼に対する作動距離を検出する作動距離検出光学系を兼用する（詳しくは、後述する）。なお、被検眼に対するＺ方向アライメント用の光学系と、被検眼（他の障害物も含む）へのノズル１３の接触回避用の作動距離検出光学系は、必ずしも兼用させる必要はなく、別構成であっても良い。なお、これら角膜変形検出及び作動距離検出の光学系は、実際には被検眼に対して左右方向に配置されている。なお、眼圧測定部１ａは、上記構成の他に、ＸＹ方向アライメント、固視、前眼部観察等を行うための周知の構成を有する。   The light source 40 and the collimator lens 41, the light receiving lens 42, the filter 43, and the light receiving element 47 form a working distance detection optical system 49 for detecting an alignment state in the working distance direction (Z direction) with respect to the eye E. . At this time, the light source 40 has a role of a light projecting light source that emits light for detecting a working distance. When light is emitted from the light source 40, the corneal reflected light from the light source 40 enters the light receiving element 47 (for example, PSD or line sensor) as a position detecting element in the working distance direction from the light receiving lens 42 via the half mirror 44. To do. When the eye E (cornea Ec) moves in the Z direction, the incident position of the corneal reflection image by the light source 40 also moves on the light receiving element 47, so that the alignment in the Z direction with respect to the eye E based on the output signal from the light receiving element 47 is performed. The state can be detected. In the present embodiment, the working distance detection optical system 49 receives the switching signal from the eye refractive power measurement mode to the intraocular pressure measurement mode as well as the alignment to the eye to be examined, When making it usable, the working distance detection optical system for detecting the working distance of the nozzle 13 with respect to the eye to be examined is used in order to avoid contact of the nozzle 13 with the eye to be examined (including other obstacles). Will be described later). Note that the Z-direction alignment optical system for the eye to be examined and the working distance detection optical system for avoiding contact of the nozzle 13 with the eye to be examined (including other obstacles) do not necessarily have to be combined. There may be. Note that these corneal deformation detection and working distance detection optical systems are actually arranged in the left-right direction with respect to the eye to be examined. The intraocular pressure measurement unit 1a has a known configuration for performing XY-direction alignment, fixation, anterior segment observation, and the like in addition to the above configuration.

また、眼屈折力測定部１ｂは、被検眼眼底に眼屈折力測定用指標を投影し、その反射光に基づいて眼屈折力を測定する測定光学系を備える他、３次元方向のアライメント、固視及び雲無、前眼部観察等を行うための周知の構成を有する。なお、本実施形態においては、眼屈折力測定部１ｂとしたが、これに限るものではなく、眼特性を光学的に測定（検査）する構成であればよい。例えば、眼底撮影や前眼部の断面撮影等の撮影機能を持つものや、角膜測定機能を持つものが考えられる。   The eye refractive power measurement unit 1b includes a measurement optical system that projects an eye refractive power measurement index on the fundus of the subject's eye and measures the eye refractive power based on the reflected light. It has a well-known configuration for performing vision, cloudlessness, anterior segment observation, and the like. In the present embodiment, the eye refractive power measurement unit 1b is used. However, the present invention is not limited to this, and any configuration that optically measures (inspects) eye characteristics may be used. For example, a device having a photographing function such as fundus photographing or anterior eye cross-sectional photographing or a cornea measuring function is conceivable.

１１０は装置全体の制御や測定値の演算などを行う制御部である。制御部１１０は、図に示すように、モニタ２６、移動部１３０、ミラー移動ユニット９０、移動機構１００、ロータリーソレノイド１１３、光検出器４６、受光素子４７、測定データや測定等を記憶するためのメモリ１２０、眼圧測定モードと眼特性測定モードとを選択する測定モード選択スイッチ１２１ａ等を持つスイッチ部１２１、フォトセンサ３０５及び３０６、マイクロスイッチ３００、測距センサ２００等が接続されている。   A control unit 110 performs control of the entire apparatus, calculation of measurement values, and the like. As shown in the figure, the control unit 110 stores the monitor 26, the moving unit 130, the mirror moving unit 90, the moving mechanism 100, the rotary solenoid 113, the photodetector 46, the light receiving element 47, measurement data, measurements, and the like. A memory 120, a switch unit 121 having a measurement mode selection switch 121a for selecting an intraocular pressure measurement mode and an eye characteristic measurement mode, photo sensors 305 and 306, a micro switch 300, a distance measuring sensor 200, and the like are connected.

以上のような構成を備える眼科装置において、その動作について説明する。通常、先に眼屈折力を測定し、その後、眼圧測定を行う。これは先に眼圧を測定すると、圧縮空気の吹き付け等による影響が残る可能性があるからである。   The operation of the ophthalmologic apparatus having the above configuration will be described. Usually, the eye refractive power is measured first, and then the intraocular pressure is measured. This is because if the intraocular pressure is measured first, there is a possibility that the influence of blowing compressed air or the like may remain.

ここで、眼特性測定モードにおいて眼屈折力の測定が行われ、所定の測定終了条件が満たされ、検者により測定モード切換スイッチ１２１ａが押されると、制御部１１０が眼圧測定への切換信号を発し、眼圧測定モードに切換える。このとき、検者はジョイスティック４の操作により基台３に対して移動台２を被検者から遠ざける。そして、最後部まで移動台２が移動したことがマイクロスイッチ３００により検知されると、制御部１１０は、移動機構１００を駆動して眼圧測定部１ａを被検者側に移動させる。なお、モニタ２６には眼圧測定部１ａが被検者側に移動する旨が表示される。このように基台３に対して移動台２を被検者から遠ざけるようにしたのは、眼圧測定部１ａのノズル１３が測定ユニット１の筐体内からせり出す際に、被検眼とノズルが接触する可能性を軽減したり、被検者にノズルの接近による恐怖感を与えないためである。   Here, when the eye refractive power is measured in the eye characteristic measurement mode, a predetermined measurement termination condition is satisfied, and the measurement mode switch 121a is pressed by the examiner, the control unit 110 switches the signal to the intraocular pressure measurement. And switch to intraocular pressure measurement mode. At this time, the examiner moves the moving table 2 away from the subject with respect to the base 3 by operating the joystick 4. When the micro switch 300 detects that the moving table 2 has moved to the last part, the control unit 110 drives the moving mechanism 100 to move the tonometry part 1a to the subject side. The monitor 26 displays that the intraocular pressure measurement unit 1a moves to the subject side. In this way, the movable base 2 is moved away from the subject 3 with respect to the base 3 when the nozzle 13 of the intraocular pressure measuring unit 1a protrudes from the housing of the measurement unit 1 so that the subject eye and the nozzle come into contact with each other. This is in order to reduce the possibility of such a situation and to give the subject no fear of approaching the nozzle.

このような眼圧測定部の移動中、本実施形態においては、制御部１１０により、作動距離検出光学系４９により検出されるノズル１３の被検眼に対する作動距離方向の光学的な検出結果に基づいて、眼圧測定部１ａの被検者側への移動の適否を判定するようになっている。すなわち、制御部１１０は、移動機構１００の駆動による眼圧測定部１ａの被検眼側への移動中、受光素子４７からの受光信号又は他に設けられた距離センサの信号に基づいて、被検眼とノズル１３との作動距離情報の取得を行う（図４のフローチャート参照）。そして、制御部１１０は、得られた作動距離情報に基づいて、以下の条件を満たした際に被検眼（他の障害物を含む）へのノズル１３の接触を回避するべく、移動機構１００による眼圧測定部１ａのせり出し移動を停止する。   During such movement of the intraocular pressure measuring unit, in the present embodiment, based on the optical detection result in the working distance direction of the nozzle 13 with respect to the subject eye detected by the working distance detection optical system 49 by the control unit 110. The suitability of movement of the intraocular pressure measurement unit 1a toward the subject is determined. That is, the control unit 110 moves the eye pressure measurement unit 1a toward the eye to be inspected by driving the moving mechanism 100 based on a light reception signal from the light receiving element 47 or a signal from a distance sensor provided elsewhere. The working distance information between the nozzle 13 and the nozzle 13 is acquired (see the flowchart of FIG. 4). Then, based on the obtained working distance information, the control unit 110 uses the moving mechanism 100 to avoid contact of the nozzle 13 with the eye to be examined (including other obstacles) when the following conditions are satisfied. The protruding movement of the intraocular pressure measurement unit 1a is stopped.

すなわち、制御部１１０は、眼圧測定部１ａの移動中、作動距離検出光学系４９の検出結果が接触の可能性のある距離以下（例：１０ｍｍ以下）になったと判定され、かつ、測距センサ２００からの出力により被検者が装置から所定距離（例えば、４０ｃｍ）よりも近づいていると判定された（被検者の存在が検知された状態）場合には、眼圧測定部１ａのノズル１３のせり出し移動を停止する（接触の可能性のある距離以上となるまで後方へ移動させることも含む）。すなわち、前記眼圧測定部１ａを使用可能な状態とする切り換え動作を解除する。このとき、モニタ２６には眼圧測定部１ａが停止した旨の情報が表示され、検者は被検者に対してなんらかの指示を行う（例えば、一旦装置から離れてもらうなど）。このような場合、被検者自身が装置の設置場所に設けられた照明等に外乱光を遮光する役目を持つため、受光素子４７からの受光信号は作動距離検出用の光源４０による反射光の入射によるものとみなすことができる。よって、眼圧測定部１ａの移動停止動作は、被検眼へのノズル１３の接触を回避するための適切なものといえる。   That is, the control unit 110 determines that the detection result of the working distance detection optical system 49 is equal to or less than the distance that can be touched (eg, 10 mm or less) while the tonometry unit 1a is moving, and the distance measurement When it is determined by the output from the sensor 200 that the subject is closer than a predetermined distance (for example, 40 cm) from the apparatus (when the presence of the subject is detected), the intraocular pressure measurement unit 1a The protruding movement of the nozzle 13 is stopped (including moving the nozzle 13 backward until it reaches a distance where contact is possible). That is, the switching operation for making the intraocular pressure measurement unit 1a usable is canceled. At this time, information indicating that the intraocular pressure measurement unit 1a has stopped is displayed on the monitor 26, and the examiner gives an instruction to the subject (for example, once he / she leaves the apparatus). In such a case, since the subject himself / herself has a role of blocking disturbance light in the illumination provided at the installation location of the apparatus, the light reception signal from the light receiving element 47 is reflected by the light source 40 for detecting the working distance. It can be regarded as incident. Therefore, it can be said that the movement stop operation of the intraocular pressure measurement unit 1a is appropriate for avoiding the contact of the nozzle 13 with the eye to be examined.

一方、制御部１１０は、作動距離検出光学系４９の検出結果が被検眼へのノズル１３の接触の可能性のある距離以下（例：１０ｍｍ以下）になったと判定されても、測距センサ２００からの出力により被検者が装置から所定距離（例えば、４０ｃｍ）より離れていると判定された場合には、実質的に被検者が存在しないとして作動距離検出光学系４８の検出結果によらず、眼圧測定部１ａの切換移動を続行する。なお、眼圧測定部１ａの移動は続行されるが、そもそも被検者自身が近くにいないため、被検眼とノズル１３との接触の可能性は少ない。   On the other hand, even if it is determined that the detection result of the working distance detection optical system 49 is equal to or less than the distance at which the nozzle 13 can contact the eye to be inspected (for example, 10 mm or less), the control unit 110 may detect the distance measuring sensor 200. When it is determined that the subject is separated from the apparatus by a predetermined distance (for example, 40 cm) based on the output from, the detection result of the working distance detection optical system 48 indicates that the subject is not substantially present. The switching movement of the intraocular pressure measurement unit 1a is continued. In addition, although the movement of the intraocular pressure measurement unit 1a is continued, since the subject is not in the vicinity in the first place, the possibility of contact between the eye to be examined and the nozzle 13 is small.

このようにして、制御部１１０は、移動機構１００の駆動により眼圧測定部１ａを被検者側へ移動させていき、フォトセンサ３０７により遮光板３０５が検出されて眼圧測定部１ａが図２（ｂ）のような測定位置に移動したことが検出されたら、移動機構１００の駆動を停止する。これにより、眼圧測定部が被検眼の眼圧測定に使用可能な状態となる。   In this way, the control unit 110 moves the tonometry part 1a to the subject side by driving the moving mechanism 100, and the shading plate 305 is detected by the photosensor 307, and the tonometry part 1a is illustrated. If it is detected that it has moved to the measurement position such as 2 (b), the driving of the moving mechanism 100 is stopped. As a result, the intraocular pressure measuring unit can be used for measuring the intraocular pressure of the eye to be examined.

このようにして、眼圧測定が可能な状態となり、被検眼に対する測定ユニット１０のアライメントが完了したら、測定開始のトリガ信号を発し、図示無き駆動回路を介してロータリソレノイド１１３を駆動させる。ロータリソレノイド１１３の駆動によりピストン１２が移動されると、シリンダ１１内の空気が圧縮され、圧縮空気がノズル１３から角膜Ｅｃに向けて吹き付けられる。角膜Ｅｃは、圧縮空気の吹き付けにより徐々に変形し、扁平状態に達したときに光検出器４６に最大光量が入射される。制御部１１０は、圧力センサ１６からの出力信号と光検出器４６からの出力信号とに基づき眼圧を求める。   In this way, when the intraocular pressure measurement is possible and the alignment of the measurement unit 10 with respect to the eye to be examined is completed, a trigger signal for starting measurement is issued, and the rotary solenoid 113 is driven via a drive circuit (not shown). When the piston 12 is moved by driving the rotary solenoid 113, the air in the cylinder 11 is compressed, and the compressed air is blown from the nozzle 13 toward the cornea Ec. The cornea Ec is gradually deformed by the blowing of compressed air, and the maximum amount of light enters the photodetector 46 when it reaches a flat state. The control unit 110 obtains the intraocular pressure based on the output signal from the pressure sensor 16 and the output signal from the photodetector 46.

以上のような構成とすれば、眼屈折力測定モードから眼圧測定モードへの切換えるための眼圧測定部１ａの移動中に、外乱光の影響によって眼圧測定部１ａが停止（誤作動）してしまうという問題を回避することができる。   With the above configuration, the intraocular pressure measurement unit 1a stops due to the influence of ambient light (malfunction) during movement of the intraocular pressure measurement unit 1a for switching from the ocular refractive power measurement mode to the intraocular pressure measurement mode. It is possible to avoid the problem of end.

なお、本実施形態においては、測距センサ２００からの信号に基づいて間接的に受光素子４７に入射した光が作動距離検出用の光源４０からの反射光によるものであるかを判定したが、以下に示すような構成であってもよい。   In the present embodiment, it is determined based on the signal from the distance measuring sensor 200 whether the light indirectly incident on the light receiving element 47 is due to the reflected light from the light source 40 for detecting the working distance. The configuration shown below may be used.

すなわち、眼屈折力測定から眼圧測定へ切換えるための眼圧測定部１ａの移動中、作動距離検出光学系４９からの検出結果に基づいて接触の可能性のある距離以下になったと判定された場合、制御部１１０は、作動距離検出用の光源４０からの光が投光されるのを一旦停止する（図５のフローチャート参照）。このとき、受光素子４７に光源４０から発せられた光が入射することはなくなる。ここで、依然として、制御部１１０にて接触の可能性のある距離以下になったと判定されている場合には、その受光信号が外乱光によるものとみなすことができるため、作動距離検出光学系４９からの検出結果によらず、眼圧測定部１ａの移動を続行する。このような構成とすれば、作動距離検出光学系４９による検出結果が作動距離検出用の光源４０からの反射光によるものか否かであるかを直接的に判定できるので、外乱光の影響によって眼圧測定部１ａが停止してしまうという問題を回避することができる。   That is, during the movement of the intraocular pressure measurement unit 1a for switching from the eye refractive power measurement to the intraocular pressure measurement, it was determined that the distance was less than the possible contact distance based on the detection result from the working distance detection optical system 49. In this case, the control unit 110 temporarily stops the projection of the light from the light source 40 for detecting the working distance (see the flowchart in FIG. 5). At this time, the light emitted from the light source 40 does not enter the light receiving element 47. Here, when the control unit 110 still determines that the distance is less than or equal to the possibility of contact, the received light signal can be considered to be due to disturbance light, and thus the working distance detection optical system 49. Regardless of the detection result from, the movement of the intraocular pressure measurement unit 1a is continued. With such a configuration, it can be directly determined whether or not the detection result by the working distance detection optical system 49 is due to the reflected light from the light source 40 for detecting the working distance. The problem that the intraocular pressure measurement unit 1a stops can be avoided.

また、以下に示すような構成であってもよい。すなわち、スイッチ部１２１に測定モード切換スイッチ１２１ａとは別に、強制的に眼圧測定部１ａを被検眼側に移動させるスイッチ１２１ｂを設けた。なお、スイッチ構成を簡略化すべく、測定モード切換スイッチ１２１ａを長押し操作することにより、眼圧測定部１ａを強制的に移動するようにしてもよい。この場合、被検者が装置から所定の距離内にいるかどうかを判断は検者自身が行う。そして、検者により被検者が顔支持ユニット６から所定の距離内と判断され強制スイッチ１２１ｂが入力されると、制御部１１０は、作動距離検出光学系４９による検出結果から接触の可能性のある距離以下（例：１０ｍｍ以下）になったと判定されても、作動距離検出光学系４９からの検出結果によらず、眼圧測定部１ａの移動を続行する。このような構成としても、外乱光の影響によって眼圧測定部１ａが停止してしまうという問題を回避することができる。   Further, the following configuration may be used. That is, the switch 121b is provided with a switch 121b that forcibly moves the intraocular pressure measurement unit 1a toward the eye to be examined separately from the measurement mode switching switch 121a. In order to simplify the switch configuration, the intraocular pressure measurement unit 1a may be forcibly moved by long-pressing the measurement mode switch 121a. In this case, the examiner himself determines whether or not the subject is within a predetermined distance from the apparatus. When the examiner determines that the subject is within a predetermined distance from the face support unit 6 and the forced switch 121b is input, the control unit 110 determines the possibility of contact based on the detection result by the working distance detection optical system 49. Even if it is determined that the distance is less than a certain distance (for example, 10 mm or less), the movement of the tonometry part 1a is continued regardless of the detection result from the working distance detection optical system 49. Even with such a configuration, it is possible to avoid the problem that the intraocular pressure measurement unit 1a stops due to the influence of ambient light.

本実施形態に係る眼科装置の外観略図である。1 is a schematic external view of an ophthalmologic apparatus according to an embodiment. 測定ユニット内を側方から（図１中矢印Ａ方向から）見た概略構成図である。It is the schematic block diagram which looked at the inside of a measurement unit from the side (from the arrow A direction in FIG. 1). 本実施形態の眼圧測定部や制御系について説明する概略構成図である。It is a schematic block diagram explaining the intraocular pressure measurement part and control system of this embodiment. 眼圧測定部を使用可能状態とするときの動作について説明するフローチャートである。It is a flowchart explaining operation | movement when making an intraocular pressure measurement part usable state. 他の実施形態について説明するフローチャートである。It is a flowchart explaining other embodiment.

符号の説明Explanation of symbols

１ 測定ユニット
１ａ 眼圧測定部
１ｂ 眼屈折力測定部
１３ ノズル
４０ 光源
４１ コリメータレンズ
４２ 受光レンズ
４３ フィルタ
４７ 受光素子
４９ 作動距離検出光学系
１００ 移動機構
１１０ 制御部
１２１ スイッチ部
１２１ａ 測定モード選択スイッチ
２００ 測距センサ

DESCRIPTION OF SYMBOLS 1 Measurement unit 1a Tonometry part 1b Eye refractive power measurement part 13 Nozzle 40 Light source 41 Collimator lens 42 Light reception lens 43 Filter 47 Light receiving element 49 Working distance detection optical system 100 Movement mechanism 110 Control part 121 Switch part 121a Measurement mode selection switch 200 Ranging sensor

Claims (5)

眼圧測定モードにおいてノズルを介して被検眼角膜に流体を吹き付ける流体吹付手段を持ち流体の吹き付けにより角膜を変形させて眼圧を測定する眼圧測定部と，眼特性測定モードにおいて被検眼からの反射光を受光して被検眼の光学特性を測定する眼特性測定部とが配置された測定ユニットと、前記測定モードの切換信号を受けて前記眼圧測定部または眼特性測定部のどちらか一方を被検眼の測定に使用可能な状態に切り換える測定部切換手段と、該測定部切換手段により前記眼圧測定部を使用可能状態とする際に前記被検眼に光束を投光し，その反射光を受光することにより前記ノズルの被検眼に対する作動距離を光学的に検出する作動距離検出手段と、該作動距離検出手段の検出結果に基づいて、前記眼圧測定部を使用可能な状態とする切り換え動作を続行するか否かを判定して前記測定部切換手段の駆動制御を行う制御手段と、前記作動距離検出手段による検出結果が前記反射光によるものか否かであるかを直接的または間接的に検知する検知手段と、を有し、該検知手段の検知結果に基づいて、前記作動距離検出手段の検出結果が前記反射光によるものでないとされたときは前記制御手段は前記作動距離検出手段の検出結果によらず眼圧測定部の切り換えを続行するように前記測定部切換手段の駆動制御を行うことを特徴とする眼科装置。 An intraocular pressure measurement unit that has fluid spraying means for spraying fluid to the eye cornea through the nozzle in the intraocular pressure measurement mode and measures the intraocular pressure by deforming the cornea by spraying the fluid; A measurement unit in which an eye characteristic measurement unit that receives reflected light and measures an optical characteristic of the eye to be examined is arranged, and either the intraocular pressure measurement unit or the eye characteristic measurement unit in response to the measurement mode switching signal Measuring unit switching means for switching the eye to a state usable for measurement of the eye to be examined, and when the intraocular pressure measuring unit is made usable by the measurement unit switching means, a light beam is projected onto the eye to be examined, and the reflected light thereof The working distance detecting means for optically detecting the working distance of the nozzle with respect to the eye to be inspected by receiving the light, and the intraocular pressure measuring unit is made usable based on the detection result of the working distance detecting means. It is determined whether or not the switching operation is continued and whether the detection result by the working distance detection means is due to the reflected light, directly or Detecting means for detecting indirectly, and based on the detection result of the detection means, when the detection result of the working distance detection means is not due to the reflected light, the control means is the working distance. An ophthalmologic apparatus characterized by performing drive control of the measurement unit switching unit so as to continue switching of the intraocular pressure measurement unit regardless of the detection result of the detection unit. 請求項１の眼科装置において、前記検知手段は被検者の存在の有無を検知する手段であり、前記検知手段は被検者の存在の有無により前記作動距離検出手段による検出結果が前記反射光によるものか否かであるかを間接的に検知することを特徴とする眼科装置。 2. The ophthalmologic apparatus according to claim 1, wherein the detection means is means for detecting the presence or absence of a subject, and the detection means detects the result of detection by the working distance detection means based on the presence or absence of the subject. An ophthalmologic apparatus characterized by indirectly detecting whether or not it is due to the above. 請求項２の眼科装置において、前記検知手段は前記測定ユニットの前方の所定距離内における被検者の存在を検知する超音波センサであることを特徴とする眼科装置。 3. The ophthalmologic apparatus according to claim 2, wherein the detecting means is an ultrasonic sensor that detects the presence of a subject within a predetermined distance in front of the measurement unit. 請求項１の眼科装置において、前記検知手段は前記作動距離検出手段による前記被検眼への光束の投光のオン／オフを行うことにより、前記作動距離検出手段による検出結果が前記反射光によるものか否かであるかを直接的に検知することを特徴とする眼科装置 2. The ophthalmologic apparatus according to claim 1, wherein the detection means turns on / off the projection of the light beam to the eye to be examined by the working distance detection means, so that the detection result by the working distance detection means is based on the reflected light. Ophthalmic device characterized by directly detecting whether or not 眼圧測定モードにおいてノズルを介して被検眼角膜に流体を吹き付ける流体吹付手段を持ち流体の吹き付けにより角膜を変形させて眼圧を測定する眼圧測定部と，眼特性測定モードにおいて被検眼からの反射光を受光して被検眼の光学特性を測定する眼特性測定部とが配置された測定ユニットと、前記測定モードの切換信号を受けて前記眼圧測定部または眼特性測定部のどちらか一方を被検眼の測定に使用可能な状態に切り換える測定部切換手段と、該測定部切換手段により前記眼圧測定部を使用可能状態とする際に前記被検眼に光束を投光し，その反射光を受光することにより前記ノズルの被検眼に対する作動距離を光学的に検出する作動距離検出手段と、被検者の存在を検知する検知手段と、該検知手段にて被検者の存在が検知された状態において前記作動距離検出手段の検出結果に基づいて、前記眼圧測定部を使用可能な状態とする切り換え動作を解除するように前記測定部切換手段の駆動制御を行う制御手段と、を備えることをを特徴とする眼科装置。





An intraocular pressure measurement unit that has fluid spraying means for spraying fluid to the eye cornea through the nozzle in the intraocular pressure measurement mode and measures the intraocular pressure by deforming the cornea by spraying the fluid; A measurement unit in which an eye characteristic measurement unit that receives reflected light and measures an optical characteristic of the eye to be examined is arranged, and either the intraocular pressure measurement unit or the eye characteristic measurement unit in response to the measurement mode switching signal Measuring unit switching means for switching the eye to a state usable for measurement of the eye to be examined, and when the intraocular pressure measuring unit is made usable by the measurement unit switching means, a light beam is projected onto the eye to be examined, and the reflected light thereof The working distance detecting means for optically detecting the working distance of the nozzle with respect to the eye to be examined by receiving the light, the detecting means for detecting the presence of the subject, and the presence of the subject is detected by the detecting means. State And a control means for performing drive control of the measurement section switching means so as to cancel the switching operation for making the intraocular pressure measurement section usable, based on the detection result of the working distance detection means. Ophthalmic device characterized by





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